CN100349412C - Method for preventing unlawful VoIP service in communication network - Google Patents
Method for preventing unlawful VoIP service in communication network Download PDFInfo
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- CN100349412C CN100349412C CNB2004100783968A CN200410078396A CN100349412C CN 100349412 C CN100349412 C CN 100349412C CN B2004100783968 A CNB2004100783968 A CN B2004100783968A CN 200410078396 A CN200410078396 A CN 200410078396A CN 100349412 C CN100349412 C CN 100349412C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/60—Aspects of automatic or semi-automatic exchanges related to security aspects in telephonic communication systems
- H04M2203/6027—Fraud preventions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
- H04M2207/20—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place hybrid systems
- H04M2207/203—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place hybrid systems composed of PSTN and data network, e.g. the Internet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/38—Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections
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Abstract
The present invention relates to a method for preventing illegal VoIP services in a communication network. The method comprises: first, the session number of the real-time transportation protocol/ real-time transmission control protocol RTP/RTCP used by a user accessed to the communication network is obtained; then, whether the services used by the user are illegal VoIP services is determined according to the session number of the RTP/RTCP, and the illegal VoIP services are prevented. Therefore, the present invention solves the problem that when existing broadband networks discover and prevent illegal VoIP speech operators, the cost is high, and the positioning is not accurate, so that the interests of legal operators and users are effectively protected.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to the method that stops unlawful VoIP (being carried on the voice on the IP) information in a kind of communication network.
Background technology
In recent years, because popularizing of broadband access network also carried out rapidly, popularized, as OICQ, visual telephone, IP phone, VOD (video request program, Video ofDemand) etc. by the miscellaneous service that broadband access network is derived.The development of these business brings great convenience for broadband user's daily life, amusement, interchange, but because the public character of the Internet and open while have also brought more opportunity to various lawless persons, as utilize broadband network to carry out the unlawful VoIP operation, brought great impact for fixed line carrier's long-distance telecommunications service.What is more, and some lawless persons even openly peddle IP phonecard on WEB (World Wide Web) website have caused very big loss to the fixed line carrier.And the fixed line carrier can't avoid this loss by legal legal means.Therefore, the fixed line carrier adopts technological means to stop the operation of illegal VOIP voice just to become a kind of effective means that it can be selected.
As shown in Figure 1, illegal voice operation generally is to place illegal voice gateways between PSTN net and broadband network, adopt H.323, MGCP (MGCP), H.248 or SIP (session initiation protocol) as call signaling, transmit voice message by INTERNET (the Internet), utilize cheap INTERNET net to seek profit.Illegal voice network operator makes it to form little commissure choosing in PSTN net side by renting E1 special line, ATO or a plurality of telephone wires being installed, and externally provides a phone access code to use for the user; And adopt popular LAN of present situation (local area network (LAN)) or ADSL (adsl (asymmetric digital subscriber line)) mode to be linked in the big net of INTERNET usually in the broadband side, can adopt PPPOE (based on the peer-peer protocol of Ethernet) dial mode also can be that DHCP (DHCP) dynamically obtains the address and do not have authentication mode.
Usually, four kinds of voip phone patterns that on broadband networks, exist:
(1) wideband telephony is to the pattern of wideband telephony;
(2) pstn telephone is to the pattern of pstn telephone;
(3) pstn telephone is to the pattern of wideband telephony;
(4) wideband telephony is to the pattern of pstn telephone.
Be effectively to stop the unlawful VoIP service in the network, then needing to stop caller, called party in the network to have a side at least is the voice messaging of pstn telephone.
Because when domestic consumer uses NetMeeting (web conference) or OICQ to carry out audio frequency, video communication, what call signaling adopted all is H.323 to wait agreement, Media Stream uses RTP (real time transport protocol) and RTCP (transmitting control protocol in real time) equally, and is just the same with the agreement that the operation of illegal IP phone is used.Therefore we are when providing restriction illegal voice telephone operation scheme, and the problem that mainly needs to consider is exactly to hinder the audio frequency of domestic consumer, the use of video traffic.
At present, usually the restriction illegal voice telephone that adopts is for realizing that by pass through the other signaling protocol analyzer of hanging on the edge device of metropolitan area network described edge device can be the egress router of DSLAM (digital subscriber line access multiplex), L2 SWITCH (Layer 2 switch), L3 SWITCH (three-tier switch), BRAS (BAS Broadband Access Server), edge router or metropolitan area network etc.In the customer access network process, all message flows of user's online all are mirrored to the signaling protocol analyzer, by signaling protocol analyzer supervisory user initiate H.323, MGCP, H.248 or call signaling such as SIP, and the cooperation manual analysis, be illegal VoIP voice operators to determine which broadband user.
Described manual analysis process is as follows: if normal domestic consumer carries out VOIP communication, be nothing but to implement by MSN, QQ, QICQ or special VOIP software, under the normal condition, synchronization has only a VOIP session, belong to bursts of traffic amount (being embodied in to have phone a period of time, does not have for a long time later on); And illegal VOIP operation phone is owing to be used for operation, and number of users is many, synchronization have several in addition tens VOIP sessions simultaneously online, telephone traffic is average.Because protocol analyzer can only be followed the tracks of user signaling stream, therefore need manually thousands of signaling message to be analyzed, choose signaling flow at each user (based on source IP address), see whether this user's synchronization exists a plurality of VOIP session connections, whether telephone traffic is average, whether constantly online or the like, then the suspicion user is carried out identity verification, judge whether to be the disabled user.
When confirming that certain broadband user is illegal VoIP voice operators, can be on the edge device of metropolitan area network by ACL (access control lists) filtering limit Client-initiated H.323, MGCP, H.248 or voip signaling such as SIP stop the operation of user's unlawful VoIP voice.
As can be seen, such scheme has following shortcoming:
Applied signaling protocol analyzer equipment costs an arm and a leg usually, if all place a signaling protocol analyzer at each node of metropolitan area network edge device, cost is huge, and operation can't be born; Use if a plurality of equipment are shared, determine that then disabled user's required time is oversize, can't reach expection restriction disabled user's effect.And, because the edge device of metropolitan area network is with all users' message mirror image or be transmitted to the signaling protocol analyzer all, port capacity and performance disposal ability to the signaling protocol analyzer are had relatively high expectations, most of signaling protocol analyzer all can not meet the demands, even meet the demands, the signaling protocol analyzer also is very expensive.
Because domestic consumer also uses these agreements to carry out voice communication, thus determine whether to the unlawful VoIP user procedures also needs to drop into great amount of manpower analysis, and also often there is bigger misinformation probability in analysis result; In this case, if just by ACL filtering limit Client-initiated H.323, MGCP, H.248 or VOIP signaling such as SIP possibly the broadband voice conversation of common validated user is caused inhibition, thereby damage the interests of validated user;
In addition, if the TCP/UDP port numbers that signaling protocol uses is revised by illegal VOIP voice operator, then possibly can't accomplish effective inhibition to the operation of illegal VOIP voice by ACL.
At present, the another kind restriction illegal voice telephone that adopts usually is to realize by detect simultaneously online UDP (User Datagram Protoco (UDP)) session number of user on the edge device of metropolitan area network.The user who surpasses certain thresholding for the UDP session number alarms, and lists the suspicion list of unlawful VoIP operation in.Cooperate manual analysis, further determine whether it is illegal VoIP operator.
This mode is normally based on following hypothesis: what the web page browsing of normal users was used all is that TCP (transmission control protocol) connects; The application that may use UDP to connect comprises recreation, OICQ (a kind of online service software), MSN (network online service), audio frequency, video etc., and the user uses the occasion of these application can be not too many simultaneously, therefore the user only can use seldom several UDP sessions when normal online.Because the Media Stream of each voip phone need use two UDP sessions (promptly taking two udp ports), therefore can reach the purpose of restriction illegal IP phone operation by limiting the simultaneously online maximum UDP session number of each user.
Yet, the online occasion of use UDP session of using is considerably beyond application such as above-named recreation, OICQ, MSN, audio frequency, videos, the application of other non-Streaming Medias is also very many, therefore can't determine whether the user is unlawful VoIP operator according to the UDP session number, also just can't stop the operation of unlawful VoIP voice by restriction UDP session number.Otherwise, may limit the UDP session of normal users.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide the method that stops unlawful VoIP service in a kind of communication network, both can effectively limit unlawful VoIP operator and carry out the VoIP business, can also guarantee that normal VoIP business was not affected.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides the method that stops unlawful VoIP service in a kind of communication network, comprising:
A, obtain the real time transport protocol that the user of access communications network using/transmit in real time control protocol RTP/RTCP session number;
B, determine unlawful VoIP service, and stop described unlawful VoIP service according to described RTP/RTCP session number.
Described steps A comprises:
By the edge device in the network, perhaps, edge device and private server are obtained described RTP/RTCP session number.
Described edge device comprises:
Digital subscriber line access multiplex DSLAM, Layer 2 switch, three-tier switch, BAS Broadband Access Server, edge router or egress router.
Described steps A comprises:
On A1, the edge device in network all customer data reported agreement UDP message redirecting or be mirrored in the private server;
A2, described private server are analyzed described UDP message, obtain RTP/RTCP message wherein;
A3, the same user's of statistics RTP/RTCP session number.
Described steps A 3 comprises:
Determine the user's IP address information of described RTP/RTCP message correspondence, add up the RTP/RTCP session number that same user is using based on described IP address information.
Described steps A comprises:
On the edge device in network all customer data newspaper agreement UDP message is analyzed, obtained RTP/RTCP message wherein, and add up same user's RTP/RTCP session number.
Described step B comprises:
B1, judge that whether described RTP/RTCP session number surpasses the threshold value of setting, if surpass, execution in step B2 then, otherwise, do not deal with;
B2, determine that this user's VoIP is professional and be unlawful VoIP service, stop this unlawful VoIP service.
Among the present invention, the processing procedure of the described prevention unlawful VoIP service of step B2 comprises:
Described user signaling message is carried out discard processing;
And/or, to all RTP/RTCP sessions of described user or exceed the RTP/RTCP session of setting quantity and carry out unidirectional packet loss, two-way packet loss, packet loss or degradation treatment at random.
Described method also comprises:
Exceeding the user who sets threshold value to online RTP/RTCP session number of while sends a warning message.
Described step B comprises:
Online RTP/RTCP session number of while is exceeded the user who sets threshold value analyze, determine whether its corresponding service is unlawful VoIP service according to its user type information.
As seen from the above technical solution provided by the invention, the present invention determines unlawful VoIP voice operator according to user's online RTP/RTCP session number of while on network edge device, and stops it to be engaged in the operation of unlawful VoIP voice.The invention solves the problem that existing broadband networks is found and stoped unlawful VoIP voice operator cost height, location to be forbidden, with legal operator of effective protection and user's interests.
Description of drawings
Fig. 1 is for realizing the schematic network structure of VoIP business;
Fig. 2 is the flow chart of method of the present invention.
Embodiment
Core concept of the present invention is to find and stop or limit the operation of unlawful VoIP voice by RTP/RTCP simultaneously online according to the broadband user on edge device (real time transport protocol/transmit in real time control protocol) session number in existing broadband network.Described edge device generally includes: the egress router of DSLAM, L2SWITCH, L3 SWITCH, BRAS, edge router or metropolitan area network etc.
Among the present invention the application layer protocol of VoIP voice message comprise signaling protocol (such as SIP, H.323, MGCP and H.248 wait) and stream media protocol, described stream media protocol comprises RTP and RTCP, because normal users and unlawful VoIP operation user signaling agreement are just the same, all can't discern the operation whether broadband user is engaged in the unlawful VoIP voice by the application layer signaling protocol.
Although in actual applications, the Media Stream of each voip phone need use two UDP sessions, but ground uses the non-Streaming Media of UDP to use very many in network, cause and to determine the Media Stream quantity that the user uses according to the UDP session number, and then determine whether it is unlawful VoIP operator.
Therefore, the present invention considers can the user be carried on RTP on the UDP and the number of connection of RTCP message is determined the Media Stream quantity that the user uses by detecting, and then judges whether the user exists the possibility of illegal operation.
Normal users is generally carried out Streaming Media conversation or video request program, can not take too much RTP and the linking number of RTCP; And illegal VoIP provider customer is because it need provide VoIP business for a large amount of users simultaneously, therefore need carry out the linking number of several at least dozens or even hundreds of at most RTP and RTCP simultaneously, the present invention just is being based on this feature and is determining unlawful VoIP operator in the network.
Below in conjunction with Fig. 2 the specific implementation of method provided by the invention is described further, this method specifically may further comprise the steps:
Step 21: obtain the RTP/RTCP session number that the user of access communications network is using, so that determine according to described session number whether described user is the disabled user;
The essence of obtaining described RTP/RTCP session number is exactly RTP and the RTCP message amount that detects on the user UDP, and detecting the RTP/RTCP message then needs to analyze using layer protocol;
Among the present invention, specifically can adopt two kinds of methods to carry out each user's the obtaining of RTP/RTCP session number, two kinds of methods are respectively:
First method is: the detection and the statistics that realize user RTP and RTCP message on the edge equipment such as egress router of existing DSLAM, L2 SWITCH, L3 SWITCH, BRAS, edge router or metropolitan area network;
Second method is: with all the UDP message redirectings on the edge device or be mirrored to one and be used for detecting and adding up on the private server of RTP and RTCP message specially, by this private server the UDP message is analyzed, if the RTP/RTCP message, the RTP/RTCP session number of then adding up each user respectively according to IP address.
Step 22: whether the RTP/RTCP session number of judging same user surpasses the threshold value of setting, if surpass, then execution in step 23, otherwise, execution in step 24;
The threshold value of described setting is to determine according to the contingent RTP/RTCP session number of legal voip user in the network, to avoid influencing normally carrying out of legal VoIP business in the network;
For further guaranteeing determined unlawful VoIP user's accuracy, can also assist among the present invention with the manual analysis process, promptly cooperate simple manual analysis, surpass with further judgement whether the user who sets threshold value is the user who carries out the unlawful VoIP service operation; Information such as user type when described simple manual analysis is meant and applies in the telecommunication business Room according to it are analyzed, judge whether to be illegal VOIP operation user, the user type of described validated user comprises network bar users, fixed telephone bar user, legal VOIP voice operator, enterprise customer or individual domestic consumer etc., if this user's user type belongs to enterprise customer or individual domestic consumer, then it is that the possibility of illegal VOIP operator is very big, need take the prevention measure.Certainly, can whether be the unlawful VoIP user further by access device also according to user type to the user who surpasses the setting threshold value.
Step 23: threshold value that surpasses setting and the VoIP business that is defined as illegal voip user are stoped processing, can also send a warning message to the unlawful VoIP user simultaneously;
If determine that a certain user is engaged in the unlawful VoIP service operation, then can on the private server of edge device or special disposal RTP and RTCP message, limit, concrete method for limiting comprises:
1, will be at this unlawful VoIP user's SIP, H.323, MGCP and H.248 wait signaling message to carry out discard processing;
2, limit each user's RTP/RTCP session number, the RTP/RTCP session message that surpasses the RTP/RTCP session number is carried out unidirectional packet loss, two-way packet loss or packet loss at random, also can carry out degradation treatment, such as postponing to handle etc.; This mode has only the user of 1～2 visual telephone can not produce any influence to common;
3, for all RTP/RTCP message fill order of unlawful VoIP user to packet loss, two-way packet loss or packet loss at random, also can carry out degradation treatment, such as postponing to handle etc.;
Above-mentioned three kinds of modes can be used wherein a kind of mode separately, also can several mode applied in any combination.
Speech business needs higher service quality usually, such as requiring low packet loss ratio, low delay, low delay variation etc.Therefore,, lose a message, can recognize tangible noise for speech business; High time delay may cause the conversation difficulty even interrupt fully; Big delay variation causes easily then that buffering area overflows and causes packet loss.And adopt Transmission Control Protocol owing to it for normal business of networking, insensitive to service quality, packet loss can retransmit, and delay and delay variation are to not significantly influence of data transfer rate, therefore, if adopt the above-mentioned the 2nd and the 3rd kind of processing mode, will can not cause unacceptable influence to normal business of networking;
Step 24: do not do any processing, and execution in step 21.
In sum, the present invention not only can effectively determine unlawful VoIP service operator, simultaneously, can also stop the normal operation of unlawful VoIP service, and can guarantee to stop carrying out of other business in the network of not influencing in the unlawful VoIP service process.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1, stop the method for unlawful VoIP service in a kind of communication network, it is characterized in that, comprising:
A, obtain the real time transport protocol that the user of access communications network using/transmit in real time control protocol RTP/RTCP session number;
B, determine unlawful VoIP service, and stop described unlawful VoIP service according to described RTP/RTCP session number.
2, stop the method for unlawful VoIP service in the communication network according to claim 1, it is characterized in that described steps A comprises:
By the edge device in the network, perhaps, edge device and private server are obtained described RTP/RTCP session number.
3, stop the method for unlawful VoIP service in the communication network according to claim 2, it is characterized in that described edge device comprises:
Digital subscriber line access multiplex DSLAM, Layer 2 switch, three-tier switch, BAS Broadband Access Server, edge router or egress router.
4, stop the method for unlawful VoIP service in the communication network according to claim 2, it is characterized in that described steps A comprises:
On A1, the edge device in network all customer data reported agreement UDP message redirecting or be mirrored in the private server;
A2, described private server are analyzed described UDP message, obtain RTP/RTCP message wherein;
A3, the same user's of statistics RTP/RTCP session number.
5, stop the method for unlawful VoIP service in the communication network according to claim 4, it is characterized in that described steps A 3 comprises:
Determine the user's IP address information of described RTP/RTCP message correspondence, add up the RTP/RTCP session number that same user is using based on described IP address information.
6, stop the method for unlawful VoIP service in the communication network according to claim 1 and 2, it is characterized in that described steps A comprises:
On the edge device in network all customer data newspaper agreement UDP message is analyzed, obtained RTP/RTCP message wherein, and add up same user's RTP/RTCP session number.
7, stop the method for unlawful VoIP service in the communication network according to claim 1, it is characterized in that described step B comprises:
B1, judge that whether described RTP/RTCP session number surpasses the threshold value of setting, if surpass, execution in step B2 then, otherwise, do not deal with;
B2, determine that this user's VoIP is professional and be unlawful VoIP service, stop this unlawful VoIP service.
8, stop the method for unlawful VoIP service in the communication network according to claim 7, it is characterized in that the processing procedure of the described prevention unlawful VoIP service of step B2 comprises:
Described user signaling message is carried out discard processing;
And/or, to all RTP/RTCP sessions of described user or exceed the RTP/RTCP session of setting quantity and carry out unidirectional packet loss, two-way packet loss, packet loss or degradation treatment at random.
9, stop the method for unlawful VoIP service in the communication network according to claim 1, it is characterized in that described method also comprises:
Exceeding the user who sets threshold value to online RTP/RTCP session number of while sends a warning message.
10, according to the method that stops unlawful VoIP service in claim 1 or the 9 described communication networks, it is characterized in that, determine that according to described RTP/RTCP session number the step of unlawful VoIP service comprises:
Online RTP/RTCP session number of while is exceeded the user who sets threshold value analyze, determine whether its corresponding service is unlawful VoIP service according to its user type information.
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| CNB2004100783968A CN100349412C (en) | 2004-09-27 | 2004-09-27 | Method for preventing unlawful VoIP service in communication network |
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| CNB2004100783968A CN100349412C (en) | 2004-09-27 | 2004-09-27 | Method for preventing unlawful VoIP service in communication network |
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| CN100349412C true CN100349412C (en) | 2007-11-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8185040B2 (en) * | 1999-08-24 | 2012-05-22 | Gogo Llc | System for managing voice over internet protocol communications in a network |
| CN101399709B (en) * | 2007-09-28 | 2011-06-29 | 福建星网锐捷网络有限公司 | Method, device and system for network monitoring |
| FR3050353B1 (en) * | 2016-04-13 | 2019-05-31 | Fraudbuster | METHOD FOR BLOCKING A VOIP CALL |
| CN111314359B (en) * | 2020-02-20 | 2022-07-19 | 上海欣方智能系统有限公司 | Anti-fraud method based on SIP signaling collection |
| CN112788016B (en) * | 2020-12-31 | 2023-04-18 | 上海欣方智能系统有限公司 | Illegal user identification method and device, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030123434A1 (en) * | 2001-12-28 | 2003-07-03 | Makoto Hirayama | Internet telephone system |
| CN1489355A (en) * | 2002-10-10 | 2004-04-14 | 华为技术有限公司 | Network system and method for processing VOIP business based on media net-link control protocol |
| US20040109414A1 (en) * | 2002-12-10 | 2004-06-10 | Choi Gil Young | Method of providing differentiated service based quality of service to voice over internet protocol packets on router |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030123434A1 (en) * | 2001-12-28 | 2003-07-03 | Makoto Hirayama | Internet telephone system |
| CN1489355A (en) * | 2002-10-10 | 2004-04-14 | 华为技术有限公司 | Network system and method for processing VOIP business based on media net-link control protocol |
| US20040109414A1 (en) * | 2002-12-10 | 2004-06-10 | Choi Gil Young | Method of providing differentiated service based quality of service to voice over internet protocol packets on router |
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